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Finding the Fourth Proportional to 381,712.40, 572,422.80 and 115,384.40

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Solution

The fourth proportional to 381,712.40, 572,422.80 and 115,384.40 is: 173,032.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,712.40 : 572,422.80 = 115,384.40 : x
  2. Step 2: Convert to fraction form
    381,712.40/572,422.80 = 115,384.40/x
  3. Step 3: Cross multiply
    381,712.40x = 572,422.80 × 115,384.40
  4. Step 4: Simplify right side
    381,712.40x = 66,048,661,324.32
  5. Step 5: Solve for x
    x = 66,048,661,324.32/381,712.40
  6. Step 6: Final answer
    x = 173,032.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.